1·Another concept that's very basic here is covariance.
另一个基本的概念是协方差。
2·A negative covariance means that they tend to move opposite each other.
负值的协方差就表示，二者反向变动。
3·The eigenvalue of covariance matrix can be used to separate signal from noise.
利用协方差矩阵的特征值。 能实现信号和噪声的分解。
4·Thereinto, for the spectral decomposition estimate of the covariance matrix , we can gain the risk functions under some losses.
其中，对于观测向量协方差阵的谱分解估计，我们很容易得到它在一些损失下的风险函数。
5·By using the arrays normalized general impedance matrix to express the mutual coupling between the elements, the characteristics of the covariance matrix of the adaptive arrays are analyzed.
用天线阵归一化广义阻抗矩阵表示单元互耦，分析了考虑单元互耦效应的自适应天线协方差矩阵的特点。